Ffmpeg ERROR: audio conversion failed: Unknown encoder 'libmp3la

Question

While i use youtube-dl script with -x --audio-format mp3 option i get this error:
ERROR: audio conversion failed: Unknown encoder 'libmp3lame'
[bahaa@Bahaa ~]$ pacman -Qs lame
local/lame 3.99.5-2
A high quality MPEG Audio Layer III (MP3) encoder
local/twolame 0.3.13-7
An optimized MPEG Audio Layer 2 (MP2) encoder
[bahaa@Bahaa ~]$

Answer 1

teckk wrote:
If you are trying to dump the audio from a youtube video with ffmpeg, and encode it to .mp3, troubleshoot what isn't working the way you wish.
Start by seeing if youtube-dl is working.
You can get the formats the video is available in with:
youtube-dl -F http://www.youtube.com/watch?v=123456789
You can usually get audio only using
youtube-dl -f 140 http://www.youtube.com/watch?v=123456789
That will be .aac or .m4a audio
You can leave it like that or to reencode to .mp3
Check if ffmpeg is working.
ffmpeg -i file.m4a -c:a libmp3lame -b:a 128k Oufile.mp3
Or if you have a video file that you want to dump the audio from into .mp3
ffmpeg -i file.mp4 -vn -c:a libmp3lame -b:a 128k Outfile.mp3
If you get an error about lame then check if lame is installed
pacman -Ss lame
Post if ffmpeg works ok for you.
[bahaa@Bahaa ~]$ youtube-dl -F https://www.youtube.com/watch?v=MzjOPtInf1c
[youtube] Setting language
[bahaa@Bahaa ~]$ youtube-dl https://www.youtube.com/watch?v=MzjOPtInf1c
[youtube] Setting language
[youtube] Confirming age
[youtube] MzjOPtInf1c: Downloading webpage
[youtube] MzjOPtInf1c: Downloading video info webpage
[youtube] MzjOPtInf1c: Extracting video information
[download] Destination: Why Do We Blink-MzjOPtInf1c.mp4
[download] 100% of 36.64MiB in 00:49
[bahaa@Bahaa ~]$ ffmpeg -i Why\ Do\ We\ Blink-MzjOPtInf1c.mp4 -vn -c:a libmp3lame -b:a 128k Outfile.mp3
ffmpeg version N-66269-g5eef704 Copyright (c) 2000-2014 the FFmpeg developers
built on Sep 14 2014 16:02:01 with gcc 4.9.1 (GCC)
configuration:
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Why Do We Blink-MzjOPtInf1c.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2014-10-17 18:20:58
Duration: 00:02:51.34, start: 0.000000, bitrate: 1793 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1599 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
Metadata:
creation_time : 2014-10-17 18:20:59
handler_name : IsoMedia File Produced by Google, 5-11-2011
Unknown encoder 'libmp3lame'
[bahaa@Bahaa ~]$ pacman -Ss lame
extra/lame 3.99.5-2 [installed]
A high quality MPEG Audio Layer III (MP3) encoder
community/flam3 3.0.1-4
Tools to create/display fractal flames: algorithmically generated images and animations
community/toolame 02l-10
An optimized mpeg 1/2 layer 2 audio encoder
community/twolame 0.3.13-7 [installed]
An optimized MPEG Audio Layer 2 (MP2) encoder
[bahaa@Bahaa ~]$